console.log("1");

      setTimeout(function () {
        console.log("2");
        process.nextTick(function () {
          console.log("3");
        });

        new Promise(function (resolve) {
          console.log("4");
          resolve();
        }).then(function () {
          console.log("5");
        });
      });
      // 中间件
      process.nextTick(function () {
        console.log("6");
      });
      //
      new Promise(function (resolve) {
        console.log("7");
        resolve();
      }).then(function () {
        console.log("8");
      });
      //
      setTimeout(function () {
        console.log("9");
        process.nextTick(function () {
          console.log("10");
        });

        new Promise(function (resolve) {
          console.log("11");
          resolve();
        }).then(function () {
          console.log("12");
        });
      });